起動
--privilegedオプションをつける
docker run -d --privileged centos /sbin/init
bashにログイン
docker exec -it 0194fd8abde9 /bin/bash
systemctlコマンド実行できた
[root@0194fd8abde9 /]# systemctl status dbus.service
● dbus.service - D-Bus System Message Bus
Loaded: loaded (/usr/lib/systemd/system/dbus.service; static;
vendor preset: disabled)
Active: active (running) since Mon 2019-10-07 07:08:58 UTC;
2min 25s ago
Docs: man:dbus-daemon(1)
Main PID: 50 (dbus-daemon)
CGroup: /docker/
0194fd8abde967b627918642e75db65a78fc4679d2723d150e96fcd20ebd5f04/
system.slice/dbus.service
└─50 /usr/bin/dbus-daemon --system --address=systemd:
--nofork --nopidfile --systemd-activation
‣ 50 /usr/bin/dbus-daemon --system --address=systemd:
--nofork --nopidfile --systemd-activation
Oct 07 07:08:58 0194fd8abde9 systemd[1]: Started D-Bus System Message
Bus.
[root@0194fd8abde9 /]#
詳しくはよくわからない